TM 9-2350-256-10(c)Loosen two wingnuts (5) and turn two retainers (6) until they clear periscope (7).(d)Pull down on periscope (7) to remove it from recess.(2)Installation.(a)Insert periscope (7) into recess.(b)Turn two retainers (6) and tighten two wingnuts (5) to secure periscope (7).WARNINGChock roadwheels to prevent vehicle from rolling.NOTESteps (c) and (d) below apply only to vehicles equipped with exhaust smokegenerating system.(c)Turn steering wheel (1) right.(d)Install vehicle exhaust smoke bracket (4), two washers (3), and two screws (2).3-37